package com.srv4pos.server.api.keyboard;
   
   import com.srv4pos.server.api.infrastructure.EmptyConnectionWriter;
   import com.srv4pos.server.api.infrastructure.HttpMethod;
   import com.srv4pos.server.api.infrastructure.IdentifierInfo;
   import com.srv4pos.server.api.infrastructure.StringConnectionWriter;
   import com.srv4pos.server.api.infrastructure.credentials.Credentials;
   import com.srv4pos.server.api.infrastructure.http.HttpHelper;
   import com.srv4pos.server.api.infrastructure.http.Transport;
  import com.srv4pos.server.api.infrastructure.request.StringResponse;
  
  import java.net.URL;
  import java.util.HashMap;
  import java.util.List;
  
  import static com.srv4pos.server.api.infrastructure.request.RequestHelper.requestString;
  import static com.srv4pos.server.api.infrastructure.request.RequestHelper.requestVoid;
  
  /**
   * Service for reaching Keyboard entity. <p>User: Sergey, Date: 18.03.14 18:14</p>.
   */
  public class KeyboardService {
      private URL url;
      private Credentials credentials;
      private Transport transport;
  
      /**
       * Constructs the service.
       *
       * @param url         of the server
       * @param credentials to work with the server
       * @param transport   to know the method to reach the server
       */
      public KeyboardService(URL url, Credentials credentials, Transport transport) {
          this.url = url;
          this.credentials = credentials;
          this.transport = transport;
      }
  
      /**
       * Returns an entity.
       *
       * @param version    latest version of seller, may be null (if latest data needed)
       * @param identifier identifies entity
       * @return null if not modified since version or entity. if version is null then return value can not be null
       * @throws com.srv4pos.server.api.exceptions.VersionConflictJsonException if version mismatch
       * @throws com.srv4pos.server.api.exceptions.NotFoundJsonException        if entity is not found
       * @see KeyboardServiceSample
       */
      public KeyboardInfo get(Integer version, String identifier) {
          StringResponse response = requestString(credentials.getSellerId() + "/keyboards/" + identifier, HttpMethod.GET, url, credentials.toAuthentication(),
                  HttpHelper.integerToETag(version), null, EmptyConnectionWriter.EMPTY_CONNECTION_WRITER,
                  HttpHelper.CONTENT_TYPE_APPLICATION_JSON, transport);
          return response == null ? null : KeyboardInfo.fromJsonToKeyboardInfo(response.getContent());
      }
  
      /**
       * Put keyboard to the server.
       *
       * @param version      expected latest version of seller
       * @param keyboardInfo data to put
       * @throws com.srv4pos.server.api.exceptions.VersionConflictJsonException if version mismatch
       */
      public void put(int version, KeyboardInfo keyboardInfo) {
          requestVoid(credentials.getSellerId() + "/keyboards/" + keyboardInfo.getIdentifier(), HttpMethod.PUT, url, credentials.toAuthentication(),
                  HttpHelper.integerToETag(version), null, new StringConnectionWriter(keyboardInfo.toJson()),
                  HttpHelper.CONTENT_TYPE_APPLICATION_JSON, transport);
      }
  
      /**
       * Create keyboard on the server.
       *
       * @param version      expected latest version of seller
       * @param keyboardInfo data to put
       * @return generated unique identifier
       * @throws com.srv4pos.server.api.exceptions.VersionConflictJsonException if version mismatch
       */
      public IdentifierInfo create(int version, KeyboardInfo keyboardInfo) {
          return IdentifierInfo
                  .fromJsonToIdentifierInfo(requestString(credentials.getSellerId() + "/keyboards", HttpMethod.POST, url, credentials.toAuthentication(),
                          HttpHelper.integerToETag(version), null, new StringConnectionWriter(keyboardInfo.toJson()),
                          HttpHelper.CONTENT_TYPE_APPLICATION_JSON, transport).getContent());
      }
  
      /**
       * Delete keyboard from the server.
       *
       * @param version    current version of the entity
       * @param identifier identifies entity
       * @throws com.srv4pos.server.api.exceptions.VersionConflictJsonException if version mismatch
       */
      public void delete(int version, String identifier) {
          requestVoid(credentials.getSellerId() + "/keyboards/" + identifier, HttpMethod.DELETE, url, credentials.toAuthentication(),
                  HttpHelper.integerToETag(version), null, EmptyConnectionWriter.EMPTY_CONNECTION_WRITER,
                  HttpHelper.CONTENT_TYPE_APPLICATION_JSON, transport);
      }
  
      /**
       * Returns list of item changes between two versions.
      *
      * @param versionFrom version from included
      * @param versionTo   version to included
      * @return list of items to be added, edited or deleted ({@link KeyboardInfo#deleted} = true)
      */
     public List<KeyboardInfo> listDiff(int versionFrom, int versionTo) {
         StringResponse response = requestString(String.format("%s/keyboards-diff/%s/%s", credentials.getSellerId(), versionFrom, versionTo),
                 HttpMethod.GET, url, credentials.toAuthentication(), null, null, EmptyConnectionWriter.EMPTY_CONNECTION_WRITER,
                 HttpHelper.CONTENT_TYPE_APPLICATION_JSON, transport);
         return (List<KeyboardInfo>) KeyboardInfo.fromJsonArrayToKeyboardInfoes(response.getContent());
     }
 
     /**
      * Returns list of entities.
      *
      * @param version version or null if fresh data required
      * @return list of entities which exists on current seller or null if list of entities is not modified since version
      */
     public List<KeyboardInfo> list(Integer version) {
         return list(version, null, null, null, null, null);
     }
 
     /**
      * Returns list of entities.
      *
      * @param firstResult when pagination starts or null
      * @param maxResults  amount of items per page or null
      * @param like        search string filter or null
      * @param orderBy     field to order by, possible values are "IDENTIFIER", "NAME", "WIDTH", "HEIGHT", "DEVICE_FORM_FACTOR"
      * @param orderDesc   field to direction of ordering
      * @param version     version or null if fresh data required
      * @return list of entities which exists on current seller or null if list of entities is not modified since version
      */
     public List<KeyboardInfo> list(Integer version,
                                    Integer firstResult,
                                    Integer maxResults,
                                    String like,
                                    KeyboardInfo.Fields orderBy,
                                    Boolean orderDesc) {
         HashMap<String, String> params = new HashMap<String, String>();
         if (orderBy != null) {
             params.put("orderBy", orderBy.name());
         }
         if (orderDesc != null) {
             params.put("orderDesc", orderDesc.toString());
         }
         if (firstResult != null) {
             params.put("firstResult", Integer.toString(firstResult));
         }
         if (maxResults != null) {
             params.put("maxResults", Integer.toString(maxResults));
         }
         if (like != null) {
             params.put("like", like);
         }
         StringResponse response = requestString(credentials.getSellerId() + "/keyboards", HttpMethod.GET, url, credentials.toAuthentication(),
                 HttpHelper.integerToETag(version), params, EmptyConnectionWriter.EMPTY_CONNECTION_WRITER,
                 HttpHelper.CONTENT_TYPE_APPLICATION_JSON, transport);
         return response == null ? null : (List<KeyboardInfo>) KeyboardInfo.fromJsonArrayToKeyboardInfoes(response.getContent());
     }
 }